Titre :
|
Enhanced heat transfer in free convection-dominated melting in a rectangular cavity with an isothermal vertical wall
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Auteurs :
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Z. Gong ;
S. Devahastin ;
A. Mujumdar
|
Type de document :
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article/chapitre/communication
|
Année de publication :
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1999
|
Format :
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p. 1237-1251
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Langues:
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= Anglais
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Catégories :
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SCIENCES FONDAMENTALES ET APPLIQUEES
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Mots-clés:
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TRANSFERT DE CHALEUR
;
CHANGEMENT D'ETAT
;
METHODE DES ELEMENTS FINIS
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Résumé :
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Free convection-dominated melting of a phase change material in a rectangular cavity with an isothermally heated vertical wall is simulated using the streamline upwind/Petrov-Galerkin finite element technique in combination with a fixed-grid primitive variable method. The enthalpy-porosity model is employed to account for the physics of the evolution of the flow at the solid/liquid interface. A penalty formulation is used to treat the incompressibility constraint in the momentum equations. Inverting of the container at an appropriate stage during the melting process is proposed as a simple but effective technique for enhancement of free convection-controlled heat transfer in the phase change material. The technique results in more than 50% increase of the energy charge rate during the melting process for some specific cases.
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Source :
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Applied Thermal Engineering, vol. 19
|